Charges and Credits - Summary of Charges (Detail) - Restructuring And Other $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($)
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	$ 439
Charges and credits, Tax	56
Charges and credits, Net	383
Workforce reduction
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	390
Charges and credits, Tax	56
Charges and credits, Net	334
Currency Devaluation Loss In Venezuela
Investment In Joint Venture [Line Items]
Charges and credits, Pretax	49
Charges and credits, Net	$ 49